A review of the genus Dexia Meigen in the Palearctic and Oriental Regions (Diptera: Tachinidae) 2705 Author Zhang, Chun-Tian Author Shima, Hiroshi Author Chen, Xiao-Lin text Zootaxa 2010 2010-12-03 2705 1 81 journal article 1175­5334 Dexia gilva Mesnil, 1980 Figs. 45−48 Dexia ( Eomyocera ) gilva Mesnil, 1980: 44 . — Herting 1984: 143 (catalog). — Shima 1989: 869 (list). — Herting & Dely-Draskovits 1993: 366 (catalog). — Chao et al . 2002: 832 (note). — Zhang et al . 2004: 128 (list). — O’Hara et al . 2009: 29 (catalog). Dexia subflava Zhang, Pang & Chao, 2005: 304 . Nomen nudum . Diagnosis. Palpus subequal in length to 1st flagellomere or shorter; prementum 2.5−3 times as long as wide; thoracic inner black longitudinal vitta 0.3−0.5 as wide as pruinose portion between inner and outer vittae; 3 presutural and 3 postsutural dorsocentral setae; 2 katepisternal setae; and legs reddish yellow. Description. Mesnil (1980) described this species in detail. We add here measurements and some diagnostic features. Body length. 8.0−13.0 mm. Male . Head : Frons 0.13−0.18 times as wide as head width, facial carina weakly developed; parafacial about twice as wide as 1st flagellomere; gena 0.4−0.5 times as wide as eye height. Inner vertical seta 0.25−0.36 times as long as eye height; 9−10 inclinate frontal setae as long as ocellar seta, longer than inner vertical seta. 1st flagellomere 2.5−3 times as long as pedicel. Prementum 2.5−3 times as long as wide; palpus at most as long as 1st flagellomere. Thorax black, with yellowish pruinosity, with 4 longitudinal black vittae on dorsum, an inner vitta 0.3−0.5 times as wide as pruinose portion between inner and outer vittae; scutellum black, with yellowish pruinosity. Proepisternum bare, postpronotal lobe with 2 strong setae; 2 presutural and 3 postsutural dorsocentral setae; 2−3 supra-alar setae, anterior one strongest; 2 katepisternal setae. Wing hyaline, brownish, tegula and basicosta reddish to dark brown; costal spine as long as crossvein r-m; relative lengths of 2nd, 3rd and 4th costal sectors approximately 1:2:1. Lower calypter with long fringe on outer margin. Legs yellow; mid tibia with 1−2 posterodorsal setae; hind tibia with 2−3 anterodorsal, 2−3 posterodorsal and 2 ventral setae. Abdomen translucent yellow, broadly black on mid longitudinal portion and posterior margin of tergites (sometimes reddish yellow); grayish white pruinosity on anterior 1/5−1/3 of tergite 3, 1/4−1/2 of tergite 4 and 1/2−3/5 of tergite 5. Syntergite 1+2 with 1−3 lateral marginal setae, without median marginal setae; tergite 3 with 1−2 pairs of discal setae, 1 pair of median marginal and 1−3 lateral marginal setae; tergite 4 with 1−2 pairs of discal setae; tergite 5 with a row of discal setae. Male terminalia . Cerci slender and slightly pointed apically; surstylus short, narrow and pointed apically; postgonite slightly shorter than basiphallus. Female . Frons 1/3−2/5 times as wide as head width; parafacial 3−4 times as wide as 1st flagellomere; gena about 1/2 eye height; 4−5 inclinate frontal setae; 2 strong proclinate and 1 reclinate orbital setae; latter about as long as ocellar seta; outer vertical setae about 1/2 as long as inner vertical seta. Thorax with yellowish gray pruinosity. Wing brown, vein M with short appendage at bend. Mid tibia with 2−3 posterodorsal setae; hind tibia with 2−4 anterodorsal, 2 posterior and 1−2 ventral setae. Abdomen reddish yellow, anterior and posterior portion of synternite 1+2 dark brown; median portion reddish brown, gleaming black on posterior 2/3−4/5 of tergite 3; 1/2−3/5 of tergites 4 and 5; gray pruinosity on anterior 1/4 of tergite 3, 1/2−2/3 on tergites 4 and 5; tergites without regular discal setae. Type material examined. Holotype male of Dexia gilva Mesnil, Shinmura, Amami-Oshima, Ryukyu Islands , JAPAN , 5.xi.1966 , T. Okuno ( BLKU ) . Paratypes . JAPAN : 13 males , Amami-Oshima and Tokunoshima Islands , xi.1966 , T. Okuno ( BLKU ) . Other material examined. CHINA . Anhui : 1 male , Mt. Mei , 21.vii.1964 , G.-T. Jin . 6 males , 2 females , Huoshan , Foziling , 11−23.ix.1964 , G.-T. Jin . 1 male , Huoshan , Dahuaping , 4.ix.1964 , G.-T. Jin ( SEMC ) . Guangxi : 1 female , Maoer Shan , 1200 m , 15−18.v.2004 , M.-F. Wang ( SNU ) . Hubei : 1 male , Songluo , 900 m , Shennengjia , 14.vi.1981 , Y.-H. Han . Sichuan : 1 male , Emei Shan , 6.vi.1955 , K.-R. Huang ( IZCAS ) . 1 male , 1 female , Emei Shan, Jingshui, 700 m , 15.viii.1998 , T. Saigusa. 2 males , 2 females , Tianquan Xian, 1100−1200 m , 30.viii.1993 , X. Liang. 1 female , Erdaogou , 1690 m , Nanping , 2.viii.1993 , H. Shima ( BLKU ) . 1 male , Zhongjiang , 27.x.1981 , X.-S. Li ( SEMC ) . 2 males , Erlang Shan , 1100−2100 m , Luding , 18.vii.2006 , J.-Y. Liu ( SNU ) . Xizang : 1 male , Xiaojilong , 2800 m , Jilong , 27.vii.1975 , Z. Wang ( IZCAS ) . 5 males , 6−25.iv.1980 , G.-T. Jin, J.-Y. Wu. 6 males , Linzi , 9.vii.1977 , J.-Y. Wu . 1 male , Beibeng , 28.vii.1977 , J.-Y. Wu . 1 male , Lang Xian , 8.vii.1977 , J.-Y. Wu . Yunnan : 1 female , Haishuihe , 2700m , Lijiang , 28.viii.1996 , H. Shima ( BLKU ) . 1 male , Liude , 2400 m , Yongsheng , 8.viii.1984 , S.-Y. Wang ( IZCAS ) . Zhejiang : 1 male , 1 female , Taishun , 29.vi.1963 , G.-T. Jin . 1 male , Tianmu Shan , 8.v.1963 , G.-T. Jin . 1 male , 1 female , Mt. Yandang , 11−18.vi.1963 , G.-T. Jin ( SEMC ) . JAPAN . Okinawa : 2 males , Asahiga-Oka , Tokunoshima , Ryukyu , 7.xi.1966 , T. Okuno leg. 1 female , Mt. Inokawa , Tokunoshima , 10.xi.1971 , S. Shinonaga . 1 male , Izumi , 29.vi.1982 , K. Ohara . 1 male , Yoma , 21.x.1994 , R. M. Ryukyus : 1 female , Uragani, Amami-Oshima Is., 30.x.1966 , T. Okuno. 1 male , Amami Is. , 16.iv.1967 , K. Honda . 2 males , 2 females , Yuwan dake, Amami- Oshima , 22−25.iv.1996 , T. Tachi . 2 males , 2 females , Tete , Inokawadake , Tokunshima , 24.iv.1996 and 28−30.iv.1996 , M. Sueyoshi and R, Matsumoto ( BLKU ) . 1 female , Amami Oshima I. , Naze city, 14.vii.1963 . 1 female , Amami Oshima I. , Yuwan-dake , 10−300 m , 29.vii.1963 , Malaise Trap , J. L. Gressitt . 1 male , Okinawa I., Hentona , 25.iii.1964 , C.S. Yoshimoto ( BPBM ) . VIETNAM . 1 female , Sapa 1500 m , Laocai , 13.v.1995 , Y. Nishikawa . 1 male , Lai Chau , Mt. Phang , Si Pang, N. ridg., 1970 m , 4.x.1995 , H. Kurahashi . 5 males , 3 females , Sapa, 1700 m , Lao Cai Prov. , 26−30.v.1997 , R. Matsumoto . 1 male , 1 female , same locality as previous, 20.vi.1999 , M.S . 2 males , Lao Cai Prov. , nr. Sapa Deo Tram Ton , 1950 m , 27−29.vi.1997 , 31.v.1999 , H. Kurahashi ( BLKU ) . Distribution. China ( Anhui , Guangxi , Hubei , Sichuan , Xizang , Yunnan , Zhejiang ); Japan (Ryukyus), Vietnam . Remarks. Dexia gilva is similar to D . flavipes from Japan , but differs from it in having wider frontal vitta, 3 supra-alar setae, inner thoracic vitta about 1/2 as wide as pruinose portion between inner and outer vittae, and reddish to dark brown tegula.